Some operations do not generate on the plan after importing the works orders.
Change the offending operation(s) number within FactoryMaster and then they will appear on the plan after the data import.
The issue is that the offending operations (e.g. 10 and 20) have a completed Actual in the dbo.orc_actuals table; so when the tasks are imported the status is set to 99 (completed) to match the existing actual.
This is why the workaround provided works, as the tasks are given new JobCodes that do not match existing actuals. When you select Actuals, View Actuals within Orchestrate, they could not be deleted from the front end because they do not appear, as they are archived tasks. To resolve this error would be to manually delete the actual entries from the database, then delete the order from Orchestrate and perform another import.